Revert of Make Error.prototype.toString spec compliant; and fix various side-effect-free error printing metho…

src/runtime/runtime-internal.cc

Index: src/runtime/runtime-internal.cc
diff --git a/src/runtime/runtime-internal.cc b/src/runtime/runtime-internal.cc
index 931525cbeb4e1f5ffba2f5064a8b598cc8d0a1d6..60f4307e30a97ccf7864b281d5de5d48312507b5 100644
--- a/src/runtime/runtime-internal.cc
+++ b/src/runtime/runtime-internal.cc
@@ -289,6 +289,18 @@
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(JSMessageObject, message, 0);
   return message->script();
+}
+
+
+RUNTIME_FUNCTION(Runtime_ErrorToStringRT) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, error, 0);
+  Handle<String> result;
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+      isolate, result,
+      isolate->error_tostring_helper()->Stringify(isolate, error));
+  return *result;
 }